package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.BaseContext;
import com.itheima.common.CustomException;
import com.itheima.common.R;
import com.itheima.entity.*;
import com.itheima.mapper.OrderMapper;
import com.itheima.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private  UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;
    /**
     * 用户下单
     * @param orders
     */
    @Transactional
    public void submit(Orders orders) {

        //获取当前用户的ID，查询购物车数据
        Long userId = BaseContext.getCurrentId();
        LambdaQueryWrapper<ShoppingCart>queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);
        if(shoppingCarts == null || shoppingCarts.size() == 0){
            throw new CustomException("用户购物车为空，不能下单");
        }
        //据当前登录用户id, 查询用户数据
        User user = userService.getById(userId);
        //根据地址ID, 查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook == null){
            throw new CustomException("用户地址信息有误，不能下单");
        }
        //组装订单明细数据, 批量保存订单明细
        long orderId = IdWorker.getId();//订单号
        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());
        //组装订单数据, 批量保存订单数据
        orders.setId(orderId);
        orders.setNumber(String.valueOf(orderId));
        orders.setOrderTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setUserId(userId);
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(orders.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                +(addressBook.getCityName() == null ? " " : addressBook.getCityName())
                +(addressBook.getDistrictName() == null ? " " : addressBook.getDistrictName())
                +(addressBook.getDetail() == null ? " " : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
        //删除当前用户的购物车列表数据
        shoppingCartService.remove(queryWrapper);

    }


    @Transactional
    public void select(Orders orders) {
        Long userId = BaseContext.getCurrentId();
        LambdaQueryWrapper<Orders>queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Orders::getUserId,userId);

    }

    /*
     * 订单明细
     *
     * */
//    public void list(Orders orders) {
//        //获取当前用户的ID
//        Long currentId = BaseContext.getCurrentId();
//        //据当前登录用户id, 查询用户数据
//        User user = userService.getById(currentId);
//        LambdaQueryWrapper<Orders>queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(Orders::getUserId,currentId);

//
//    }
}
